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Direct Effects of Light on Alertness, Vigilance, and the Waking Electroencephalogram in Humans Depend on Prior Light History

Chang, A.-M. and Scheer, F.A.J.L. and Czeisler, C.A. and Aeschbach, D. (2013) Direct Effects of Light on Alertness, Vigilance, and the Waking Electroencephalogram in Humans Depend on Prior Light History. Sleep, 36 (8), pp. 1239-1246. The American Academy of Sleep Medicine. ISSN 0161-8105

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Abstract

Study Objectives: Light can induce an acute alerting response in humans; however, it is unknown whether the magnitude of this response is simply a function of the absolute illuminance of the light itself, or whether it depends on illuminance history preceding the stimulus. Here, we compared the effects of illuminance history on the alerting response to a subsequent light stimulus. Design: A randomized, crossover design was used to compare the effect of two illuminance histories (1 lux vs. 90 lux) on the alerting response to a 6.5-h 90-lux light stimulus during the biological night. Setting: Intensive Physiologic Monitoring Unit, Brigham and Women’s Hospital, Boston, MA. Participants: Fourteen healthy young adults (6 F; 23.5 ± 2.9 years). Interventions: Participants were administered two 6.5-h light exposures (LE) of 90 lux during the biological night. For 3 days prior to each LE, participants were exposed to either 1 lux or 90 lux during the wake episode. Measurements and Results: The alerting response to light was assessed using subjective sleepiness ratings, lapses of attention, and reaction times as measured with an auditory psychomotor vigilance task, as well as power density in the delta/theta range of the waking EEG. The alerting response to light was greater and lasted longer when the LE followed exposure to 1 lux compared to 90 lux light. Conclusion: The magnitude and duration of the alerting effect of light at night depends on the illuminance history and appears to be subject to sensitization and adaptation.

Item URL in elib:https://elib.dlr.de/84795/
Document Type:Article
Title:Direct Effects of Light on Alertness, Vigilance, and the Waking Electroencephalogram in Humans Depend on Prior Light History
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Chang, A.-M.UNSPECIFIEDUNSPECIFIED
Scheer, F.A.J.L.UNSPECIFIEDUNSPECIFIED
Czeisler, C.A.UNSPECIFIEDUNSPECIFIED
Aeschbach, D.daniel.aeschbach (at) dlr.deUNSPECIFIED
Date:2013
Journal or Publication Title:Sleep
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:36
Page Range:pp. 1239-1246
Publisher:The American Academy of Sleep Medicine
ISSN:0161-8105
Status:Published
Keywords:Light history, alertness and performance, light exposure
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:ATM and Operation (old)
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Human Factors and Safety in Aeronautics (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Flight Physiology
Deposited By: Sender, Alina
Deposited On:15 Nov 2013 12:38
Last Modified:21 Sep 2019 05:06

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